'Busa? Prefer the ZX10RR. Active ram-air intake, ti-rods, etc. GSXR-R has titanium valves. W/o a doubt the best value in the liter bikes and probably the fastest stock bike (gixxer). R1M has the fractured ti-rods. They freeze the rods in liquid N and fracture a billet of Ti where the cap would be on a two piece rod. The fracture makes for perfect mating surfaces when bolted to the crank. Amazing tech.
can't beat the fireblade for crotch rocket. oh and bmw has one of the most rideable sport bikes ever with all the electronics.
I meant to mention the RR-R. The problem is that the US model is gimped. The S1K is amazing for riding position and tech, but reliability has been an issue. Great bike. My son's friend had an M1K that blew two motors. Unheard of with Japanese sport bikes.